4 Roma (plum) tomatoes, quartered, or more to taste
1 onion, sliced into thin rings
1 green bell pepper, sliced into thin rings
Dressing:
½ cup olive oil
½ cup cider vinegar
1 tablespoon chopped fresh garlic
2 teaspoons chopped fresh parsley
1 teaspoon salt
1 teaspoon white sugar
1 teaspoon ground black pepper
Place tomatoes in a shallow serving dish. Arrange onion rings on top. Arrange green bell pepper rings on top of onions. Combine olive oil, cider vinegar, garlic, parsley, salt, sugar, and black pepper in a jar. Close jar tightly and shake vigorously until dressing is well-mixed. Pour dressing over tomatoes, onions, and peppers. Refrigerate until flavors combine, about 2 hours.